Door attachment



Dec. 3, 1929. J. P. MATTHEWS DOOR ATTACHMENT Filed May 8, 1926 '2Sheets-Sheet 1 WITNISS:

\J. P. Matthews.

INVENTOR ATTORNEY Dec; 3, 1929. J. P. MATTHEWS DOOR ATTACHMENT Filed May8. 1926 2 Sheets-Sheet 2 d. P Matthe s WITNESS:

ATTORNEY ltatented Dec. 3, 1929 STATE PATENT 1 JOSEPH I. MATTHEWS, EMIT.OHELLVILLE,.MARYLAND noon ATTACHMENT Application filed May 8, 1926.Serial No. 107,800.

ment, and thus provide for ventilation when desired, without danger ofthe door slamming.

Another object of the invention is the provision of a door attachmentwhich acts as m a stop to prevent accidental movement of the door, meansbeing provided for releasing the stop for the operation of the door knobso that when the latter i rotated to unlatch the door for the purpose ofopening the same,

is the stop will be simultaneously released so as not to interfere withthe doorsniovement.

With the above and other objects in View, the invention further includesthe following novel features and details of construction,

to he hereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

in the drawings Figure 1 is an elevation of a door with the 9.5invention applied thereto.

Figure 2 is a vertical sectional View on the line 2-2 of Figure 1showing the door in closed position.

Figure 3 is a similar view with the door as partly open.

Figure l is an enlarged vertical sectional view on the line 4l4 ofFigure 1.

Figure 5 is a detail view on the line 5-5 of Figure 1.

Figure 6 is a vertical section taken at the rear of the door knob andshowing the manner of attaching the operating cable to the knob.

Referring in detail to the drawings, where in like characters ofreference denote corresponding parts, the reference character 10indicates a door, whose frame 11 includes a transom 12, the door, frameand transom being of the usual or any desired construction, being merelyillustrated to show one of the many applications of the invention.

Secured above the top of the door 10 to some stationary object, such asthe door frame or transom frame, is a bearing 13 and mounted with thishearing for pivotal movement is a vertically disposed arm 14- which iscarried by a rod 15, the latter being adapted to swing in the arc of acircle with the arm Has a center.

tilecured to the door 10 is a bracket 15 and extending vertically fromthis bracket is a sleeve or housing 17, the latter being provided with atransverse opening or slot 18 for thepassagc of the bar 15. Operatingwithin the sleeve 17 is a spring actuated plunger 19, one end of whichis pointed to provide tooth for engagement with transversely arrangednotches 20 which are provided along the lower edge of the bar 15.

The opposite or lower end of the plunger 19 is engaged by a springactuated pivotally mounted member 19 which has secured thereto one endof a cable 21, the latter passing around a pulley 22 and a pulley 23 andextending downwardly through eyes 24 where it is secured to the doorknob 25. For the purpose of securing the cable 21 to the door knob thereis provided a pair of clamping members 26 which are secured around theshank of the knob so as to extend on opposite sides to provideoppositely disposed arms 27, the lower end of the cable 21 beingbifurcated so as to connect with each of the arms 27, as shown at 28.

lVhen the knob is rotated in either direction to unlatch the door, thecable 21 will be drawn downward so as to release the plunger 19 from thenotches of the bar 15 and thus permit the door to be opened as desired.As soon as the knob is released, the spring action of the member 19 willcause the plunger to. re-engage the bar 15 and hold the door againstaccidental movement.

In order to provide auxiliary means for releasing the door and to alsoprevent reengagement of the plunger 19 with the bar 15, when desired,there is provided a branch cable 29 which is secured to the cable 21 andwhich passes over a pulley 30. The branch cable 29 carries at its freeend a ring or other device 31, which may be engaged with a hook or othermember 32 secured to the door.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserved tomake such changes as properly fall within the scope of the appendedclaim.

Having described the invention what is claimed is The combination with adoor, of a bracket secured to the door, said bracket having an openingtherethrough, a guide member mounted within and extending from thebracket, a bar slidable through the guide member and having one endpivotally secured adjacent the door, a plunger slidable within the guidemember for engagement ture.

with the bar to hold the latter against sliding movement, a springinfluenced fiat plate having one end pivotally secured to the bracketand engaging the lower end of the plunger and acting to normally holdthe latter engaged with the bar, and means connecting the otherv end ofthe pivotally mounted plate and the knob of the door to actuate theplate and release the plunger.

In testimony whereof I afiix my signa- JOSEPH P. MATTHEWS.

